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United States Patent | 5,512,383 |
Chikuma ,   et al. | April 30, 1996 |
A method of manufacturing a wavelength converting element forms an optical waveguide having a substantially uniform thickness and a desired size. A thin film of lithium niobate is formed on a substrate of lithium tantalate, and a mask corresponding to an optical waveguide is formed on the thin film. A proton exchange is performed on a predetermined area of the thin film through the mask. A potassium ion exchange is further performed on the proton-exchanged area, thus yielding the optical waveguide. The mode of light that propagates in the optical waveguide can be set to a low-order mode, so that the efficiency of converting the incident light to the second harmonic is improved.
Inventors: | Chikuma; Kiyofumi (Tsurugashima, JP); Onoe; Atsushi (Tsurugashima, JP) |
Assignee: | Pioneer Electronic Corporation (Tokyo, JP) |
Appl. No.: | 266629 |
Filed: | June 28, 1994 |
Jun 28, 1993[JP] | 5-157411 |
Current U.S. Class: | 428/689; 385/130; 385/131; 428/699; 428/701; 428/702 |
Intern'l Class: | B32B 009/00; G02B 006/00 |
Field of Search: | 359/332,328 385/122,130,131,129,132 428/210,689,699,700,701,702,409 427/163.2,523,526,529 430/11,14 |
4840816 | Jun., 1989 | Appleton | 427/38. |
4953931 | Sep., 1990 | Miyazaki | 350/96. |
4953943 | Sep., 1990 | Miyazaki | 350/96. |
5199097 | Mar., 1993 | Shinokwa | 385/122. |
5227011 | Jul., 1993 | Enomoto | 156/643. |
5357533 | Oct., 1994 | Mizuuchi | 372/22. |
5373579 | Dec., 1994 | Eda | 385/131. |